With the cult of Pentax camera fanatics theres a line of lens that are legendary..The Takumar M42 lens. Solid metal bodies, largely excellent optics....Today they are still availible and in high demand. Many digital SLR fans that use the newer full frame cameras have found these lens to be an excellent value even 50 years after they were made. Takumars are among my favorite lens. They fully meet the saying"they don't make them like that any more" my goal is to have two complete set of taks, one for the field...and one for a collection...it'll take a while!
Anyhow, One of the more common Takumars is the 200 mm f4 Super takumar, or SMC takumar. The Super Takumar has a basic lens coating to help prevent lens flare and improve optics, the SMC stands for super multicoated and its a special coating on the lens elements that pentax developed. Highly regarded and used even today. I have both these lens ..average cost $70-90.
Heres some pics I took with a poor example of the Super takumar lens...optically good, but mecahnically challenged.
-al